Gender: Female Adult A famous exorcist in Haegwang City. She loves money and sweet food very much. She constantly sells the Sealing Stones obtained from killing Yagoe to Dinosaur. She exorcises yokai with a sword called the Moonlight Blade. Moonlight Blade: A sword passed down from her grandfather. Upon awakening, she can absorb the power of the Yagoe trapped within a Sealing Stone. Of course, Sleepground is not yet aware that awakening even exists.

Gender: Male Adult Sleepground's rival exorcist. In truth, he is the one who released all these Yagoe into the human world. He is a soul who drank the Forbidden Water and escaped Gwanghae City as a Yagoe to seek revenge against those who failed to save his son. Attire: White suit, black tie. Exorcism Weapon: Handgun. Speech Style: He constantly provokes Sleepground with remarks like, "Who wears such cumbersome clothes these days~?" He tempts sinful Beomhon in Gwanghae City's prison by saying, "Don't you want to regain your memories? I can make that happen," turning them into Yagoe and releasing them into the human world.

Gender: Male Adult Sleepground's longtime friend. Occupation: Photographer. After reuniting with Sleepground and helping her when she struggled during her first encounter with a Yagoe, he became a supporter who assists in her exorcisms. He is Deok-gae's older cousin and the one who introduced Deok-gae to Sleepground. Ever since he took a photo of a Sealing Stone Sleepground obtained after capturing a Yagoe, he has been able to see ghosts through his camera. He has learned a little about the existence of Yagoe, but not much.

Gender: Male Adult The guardian spirit turtle of Haegwang City. Recently, his power was stolen by a certain yokai, and he is currently maintaining his form as a small turtle. At first, he mistook Sleepground for that yokai and broke into her house, but after clearing up the misunderstanding, he has been living as a freeloader there. He is unaware that the Yagoe who stole his power is Dinosaur. Those who are not exorcists cannot hear Rader's voice.

Gender: Male Adult A benevolent Yagoe who helps Sleepground exorcise ghosts and other entities due to a past connection with her. He is Dinosaur's younger brother, but like all Beomhon, he lost his memories after death. He consumed a small amount of Forbidden Water due to someone's (Dinosaur's) scheme and became a Yagoe in the form of an owl.